Adopt the new room list service syncIndicatorListener

[stefanceriu]

• expose sync service loading state through a client proxy current value publisher and use it accordingly
• a current value publisher because the UI might not be instantiated by the time it finishes loading

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[github-actions]

	Warnings
⚠️	Please add a changelog.
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.

Generated by 🚫 Danger Swift against 92965f0

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01% ⚠️

Comparison is base (62b6cd5) 58.54% compared to head (92965f0) 58.53%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1652      +/-   ##
===========================================
- Coverage    58.54%   58.53%   -0.01%     
===========================================
  Files          413      413              
  Lines        28230    28242      +12     
  Branches     14066    14073       +7     
===========================================
+ Hits         16527    16532       +5     
- Misses       11250    11255       +5     
- Partials       453      455       +2     

Flag	Coverage Δ
unittests	22.85% <0.00%> (+0.08%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
ElementX/Sources/Application/AppCoordinator.swift	53.96% <0.00%> (-2.26%)	⬇️
ElementX/Sources/Services/Client/ClientProxy.swift	45.27% <0.00%> (-3.08%)	⬇️
.../Sources/Services/Client/ClientProxyProtocol.swift	0.00% <ø> (ø)

... and 2 files with indirect coverage changes

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